Thanks for all the replies. You all have pretty much confirmed my fears.
It's really not that big of a deal. 4.5 actually works pretty darn well... like many of you, however, I'm an upgrade junkie and always like the latest and greatest.
I already have a tour and love it, but I have two other 8830's on my account. To be honest, I would like to upgrade the other phones as they are eligible for new upgrades on my Sprint account. The problem is, Sprint offers the discount as a rebate and after going through the mess I just went through trying to get my rebate validated on my current Tour (another story for another day), I really don't think it's worth it. ....not worth getting a Tour, you ask? ...yes, honestly not worth the amount of hassle and hours out of my day.